Scientists say they've discovered a magma buildup near a New Zealand town that explains a spate of recent earthquakes and could signal the beginnings of a new volcano -- although they're not expecting an eruption anytime soon.

Helen Clark, a former New Zealand prime minister who is now a senior U.N. official, announced Tuesday she is running for the top position at the United Nations, saying she would bring nearly 30 years of leadership skills to the job of secretary-general in a world of increasing challenges.

Helen Clark, a former New Zealand prime minister who is now a senior U.N. official, announced Tuesday she is running for the top position at the United Nations, saying she would bring nearly 30 years of leadership skills to the job of secretary-general in a world of increasing challenges.